NotSerializableException on undeploy of .ear file

[nic7834]

Hi all

Using JBoss 3.2.2 with Tomcat 4.1.27

My application includes EJBs and a web app front end built upon Struts framework. In the http session I store a collection (java.util.map) of my own data object called 'EventDO'.

I deploy my .ear and everything works. I then undeploy the .ear by deleting the file. The console output indicates that JBoss is destroying the web app. At this point I get the NotSerializableException for a field in EventDO.

Thing is I don't care to have this collection serialized as it is repopulated where required. I thought I had this covered by my WebSessionListener class:

public class WebSessionListener extends HttpServlet implements HttpSessionListener, HttpSessionBindingListener, HttpSessionActivationListener;

where I empty the collection in question and then set it to null. I have tried this in the valueUnbound(HttpSessionBindingEvent event) and the sessionWillPassivate(HttpSessionEvent httpSessionEvent) methods. Console output indicates these methods aren't called as I see no debug statements.

Can someone explain why this doesn't work. I am able to get rid of the exception by having EventDO implement the Serializable interface but thats not the behavior I want.

My web.xml file has the listener set up:

<web-app>

<listener-class>com.cci.web.WebSessionListener</listener-class>

...
</web-app>

The exception trace is this:

2004-02-06 16:31:43,035 INFO [org.jboss.web.tomcat.tc4.EmbeddedTomcatService] undeploy, ctxPath=/WabiServer, warUrl=file:/D:/Development/jboss-3.2.2_tomcat-4.1.27/server/default/tmp/deploy/tmp1758Server.ear-contents/WabiServer.war/
2004-02-06 16:31:43,035 INFO [org.jboss.web.localhost.Engine] StandardHost[localhost]: Removing web application at context path /WabiServer
2004-02-06 16:31:43,055 INFO [org.jboss.web.tomcat.tc4.EmbeddedTomcatService] undeploy, ctxPath=/WebServer, warUrl=file:/D:/Development/jboss-3.2.2_tomcat-4.1.27/server/default/tmp/deploy/tmp1758Server.ear-contents/WebServer.war/
2004-02-06 16:31:43,055 INFO [org.jboss.web.localhost.Engine] StandardHost[localhost]: Removing web application at context path /WebServer
2004-02-06 16:31:43,095 ERROR [org.jboss.web.localhost.Engine] StandardManager[/WebServer] Cannot serialize session attribute ID_EVENT for session 79F838E53D82974BA6304FE89E8C5487
java.io.NotSerializableException: java.util.PropertyResourceBundle
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1439)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:881)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:536)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:691)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:3669)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:1036)
at org.apache.catalina.core.StandardHostDeployer.remove(StandardHostDeployer.java:470)
at org.apache.catalina.core.StandardHost.remove(StandardHost.java:852)
at org.jboss.web.tomcat.tc4.EmbeddedTomcatService.performUndeploy(EmbeddedTomcatService.java:348)
at org.jboss.web.AbstractWebContainer.stop(AbstractWebContainer.java:476)
at org.jboss.deployment.MainDeployer.stop(MainDeployer.java:489)
at org.jboss.deployment.MainDeployer.stop(MainDeployer.java:504)
at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:472)
at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:467)
at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:440)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy6.undeploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.undeploy(URLDeploymentScanner.java:332)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:418)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:201)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:212)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:191)
2004-02-06 16:31:43,105 ERROR [org.jboss.web.localhost.Engine] StandardManager[/WebServer] Cannot serialize session attribute ID_COLLECTION_EVENTS for session 79F838E53D82974BA6304FE89E8C5487
java.io.NotSerializableException: java.util.PropertyResourceBundle
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
at java.util.ArrayList.writeObject(ArrayList.java:529)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:809)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1296)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1439)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:881)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:536)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:691)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:3669)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:1036)
at org.apache.catalina.core.StandardHostDeployer.remove(StandardHostDeployer.java:470)
at org.apache.catalina.core.StandardHost.remove(StandardHost.java:852)
at org.jboss.web.tomcat.tc4.EmbeddedTomcatService.performUndeploy(EmbeddedTomcatService.java:348)
at org.jboss.web.AbstractWebContainer.stop(AbstractWebContainer.java:476)
at org.jboss.deployment.MainDeployer.stop(MainDeployer.java:489)
at org.jboss.deployment.MainDeployer.stop(MainDeployer.java:504)
at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:472)
at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:467)
at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:440)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy6.undeploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.undeploy(URLDeploymentScanner.java:332)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:418)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:201)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:212)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:191)

[juha]

Any reason why you are not marking that field as 'transient' if you don't care about it being serialized?

[nic7834]

It's just that I don't want JBoss to attempt to serialize the map of EventDO objects that i've stored into the http session.

That's the reason for my WebSessionListener class attempting to empty the map and set it to null.

On a related note, could you please explain why JBoss is attempting to persist the session on undeploying the .ear file. Is this part of the clustering mechanism for high availabilty allowing the session to move onto another JBoss instance.

I thought the session would get passivated/destroyed which is part of the reason for my WebSessionListener class.

Thanks.

[adrian.brock]

http://jakarta.apache.org/tomcat/faq/misc.html

Regards,
Adrian

[nic7834]

Ahh...I understand now.

Thanks a million!

Nic

[rpolisetty1]

I too have the exact same question.

"Why is JBoss trying serialize the objects that i've stored in the http session"?

Has anyone successfully tried to disable serialization of session objects with Jboss 4.0.0 and tomcat?
Thanks a lot.
Ramesh